captioning sponsored by macneil/lehrer productions >> brown: the first working day of president obama's second term began with an inter-faith prayer service at washington's national cathedral. good evening. i'm jefl:eyifil i and'm gwen if. >> ifill: and i'm gwen ifill. on the newshour tonight, what's ahead for the next four years? we explore the vision and the agenda laid out in the president's inaugural address. >> brown: then, from tel aviv, margaret warner reports on the israeli elections, as prime minister benjamin netanyahu's party was on track to stay in power by a narrow margin. netanyahu tries to put together, it's sure to include new faces and new agendas that will influence the country. >> ifill: we examine a new study on concussions, showing the impact of hard hits on the brains of living but retired n.f.l. players. >> i go through stages where i think how come i can't remember that and i always wondered are these age-related or are they conclusion related? >> brown: and we mark the 40th anniversary of the "roe v. wade" decision by the supreme court, with a look at the strate